<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
		<script>
			window=null;
			window.alert(111);
			function add(a,b){
				alert(a+b);
			}
			/*(function(){
				
			})();*/
			//初始化函数
			/*(function(){
				alert("welcome");
			})();*/
			(function(a,b,c){
				c.write("welcome:"+(a+b));
			})(40,50,document);
		</script>
	</head>
	<body>
	</body>
</html>
